Date: Wed, 10 Mar 2021 01:33:28 +0100 From: =?utf-8?Q?Klaus_K=C3=BCchemann?= <maciphone2@googlemail.com> To: Mark Millard <marklmi@yahoo.com>, Mark Murray <markm@FreeBSD.org>, freebsd-arm@freebsd.org, bob prohaska <fbsd@www.zefox.net> Subject: Re: RPI4/8GB i2c not working? Message-ID: <D7553FC1-7545-4823-A04D-598BA53BA94D@googlemail.com> In-Reply-To: <599EDCF7-D716-4645-8832-E429C5E17F6E@yahoo.com> References: <0D013C24-3CDD-4262-922C-524916ACCB10@FreeBSD.org> <E4AACBB5-4ADB-4BDC-936F-9BF8D45B3EC9@googlemail.com> <DD3F8DC8-03ED-40A7-8709-86F7BD06F8C8@googlemail.com> <599EDCF7-D716-4645-8832-E429C5E17F6E@yahoo.com>
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> Am 10.03.2021 um 00:51 schrieb Mark Millard <marklmi@yahoo.com>: >=20 >=20 > Nor do I see *ds3231* at: >=20 > https://github.com/raspberrypi/firmware/tree/1.20210303/boot/overlays/ =E2=80=A6 I was only GUESSING ;-) that "the other Mark M.=E2=80=9C :-) is trying = to connect an RTC because=20 one of the most annoying things on cheap arm boards is that if you = forgot to set =E2=80=9Adate' then kernel builds have the wrong date, I = even rebuilt kern when I forgot, I also always forgot to order a bunch = of RTCs :-) do you have one to test ? There=E2=80=99s a README by scrolling page down on the above link. e.g for the ds3231 it=E2=80=99s here : -- Name: i2c-rtc-gpio Info: Adds support for a number of I2C Real Time Clock devices using the software i2c controller Load: dtoverlay=3Di2c-rtc-gpio,<param>=3D<val> Params: abx80x Select one of the ABx80x family: AB0801, AB0803, AB0804, AB0805, AB1801, AB1803, AB1804, AB1805 .. =E2=80=94 ds1339 Select the DS1339 device =E2=80=94 So, something like : dtoverlay=3Di2c-rtc-gpio,<param>=3D<val> in config.txt and additional put i2c-rtc-gpio.dtbo in=20 dtb/overlays on the msdos-partition of 14-snap should make it working. So this just as an example for rtc, although I can=E2=80=99t test at the = moment and don=E2=80=99t know if there=E2=80=99s additional rtc-driver = in src. .. time to order a bunch of RTCs :-) Regards K.
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